Understanding Inflammation: The High-Sensitivity CRP Test

To identify inflammation (slow-progressing internal swelling), if you had to pick just one test, what would it be?

There are many tests to understand inflammation, and we will look at them one by one.

But to start, the most practical marker is hs-CRP (high-sensitivity CRP).

1. What is hs-CRP? * It's a protein produced by the liver. * It increases when inflammation in the body rises. * The "high-sensitivity" version can detect even subtle (low-grade) changes.

2. Why is it important? * Helps identify chronic low-grade inflammation. * Associated with the risk of heart disease, diabetes, and fatty liver. * A marker used in preventive cardiology.

3. How to understand the value? * <1 mg/L = Low risk * 1–3 mg/L = Moderate risk * >3 mg/L = High risk These values are used to understand future cardiovascular risk.

4. Does it provide a diagnosis? * No. * It is a risk indicator; finding the cause and confirming it is a separate process.

5. When should you get tested? * Visceral fat (belly fat) * Borderline sugar / HbA1c * Lipid abnormalities * Family history of heart disease * Preventive health check

6. How is the test done? * A simple blood test. * Fasting is usually not required. * Available in any standard lab.

7. How often/when to repeat? * One value is not sufficient. * It can temporarily increase due to recent infection, fever, or heavy exercise. * Therefore, it's appropriate to repeat the test in a stable condition to observe the trend.

8. Cost * Approximately ₹500–₹800 (varies by lab and city). Useful for preventive screening.

9. What are the limitations? * It can also increase due to infection, injury, obesity, smoking, and stress. * Therefore, it's essential to interpret it in context (clinical picture + other reports).

An elevated hs-CRP means an inflammatory process is ongoing in the body.

But it's not the end; it's an initial warning.

Even if the report is normal, risk might have already begun, and hs-CRP helps indicate it.

Next post: What causes hs-CRP to increase? Its connection with gut, sleep, stress, sugar, and liver.

Have you ever had an hs-CRP test and understood its meaning?

If you found this post useful, please share it. This is the beginning of understanding inflammation.

Dr Ravindra L. Kulkarni, MD, DNB, FSCAI (Cardiology) Just For Hearts